Numerical Evaluation of the Wake-Survey Equations for Subsonic Flow Including the Effect of Energy Addition
Abstract
Direct-reading tables and charts are presented for determining the drag or thrust coefficients from wake-survey measurements in the subsonic speed range. For flows wherein no energy is added, the point drag coefficient is shown to be an explicit function of the stream Mach number M sub 0 the static-pressure coefficient at the wake station P sub 1, and the total-pressure-loss coefficient change in H over 9 sub 0 where change in H is the total-pressure loss and 9 sub 0 is the stream dynamic pressure. Values of the point drag coefficient are tabulated for a wide range of values of these parameters. Inasmuch as the tabulated coefficients (either drag or thrust) represent the point values, which are independent of the integration of the wake, the charts or tables in the form presented are general in application. For flows wherein energy is added, such as flows behind propellers or heated radiators, an additional parameters, which is a function of the stagnation-temperature rise, must be considered. Values of the point drag coefficient that include the effects of the addition of energy are tabulated.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1945
- Accession Number
- ADB184327
Entities
People
- Donald D. Baals
- Mary J. Mourhess
Organizations
- National Aeronautics and Space Administration